Browsing by Keywords "Sonar"
Now showing items 1-20 of 24
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Comparative analysis of different approaches to target classification and localization with sonar
(2001)The comparison of different classification and fusion techniques was done for target classification and localization with sonar. Target localization performance of artificial neural networks (ANN) was found to be better ... -
Comparative analysis of different approaches to target differentiation and localization with sonar
(Elsevier, 2003)This study compares the performances of different methods for the differentiation and localization of commonly encountered features in indoor environments. Differentiation of such features is of interest for intelligent ... -
A comparative study of map building techniques by processing sonar arc-maps
(2005)In this study, four signal processing schemes regarding sonar sensor based map-building applications were compared. The newly proposed method, Directional Maximum is found to be successful in terms of reducing the innate ... -
Comparison of two methods for fusing information from a linear array of sonar sensors for obstacle localization
(IEEE, Piscataway, NJ, United States, 1995)The performance of a commonly employed linear array of sonar sensors is assessed for point-obstacle localization intended for robotics applications. Two different methods of combining time-of-flight information from the ... -
Comparison of two methods of surface profile extraction from multiple ultrasonic range measurements
(Institute of Physics Publishing, 2000)Two novel methods for surface profile extraction based on multiple ultrasonic range measurements are described and compared. One of the methods employs morphological processing techniques, whereas the other employs a spatial ... -
Estimation of object location and radius of curvature using ultrasonic sonar
(Elsevier, 2001-07)Acoustic sensors are very popular in time-of-flight (TOF) ranging systems since they are inexpensive and convenient to use. One of the major limitations of these sensors is their low angular resolution which makes object ... -
Evidential logical sensing using multiple sonars for the identification of target primitives in a mobile robot's environment
(IEEE (Institute of Electrical and Electronics Engineers), 1996)Physical models are used to model reflections from target primitives commonly encountered in mobile robot applications. These targets are differentiated by employing a multi-transducer pulse/echo system which relies on ... -
Fast processing techniques for accurate ultrasonic range measurements
(Institute of Physics Publishing, 2000)Four methods of range measurement for airborne ultrasonic systems - namely simple thresholding, curve-fitting, sliding-window, and correlation detection - are compared on the basis of bias error, standard deviation, total ... -
Fractional Fourier transform pre-processing for neural networks and its application to object recognition
(Pergamon Press, 2002)This study investigates fractional Fourier transform pre-processing of input signals to neural networks. The fractional Fourier transform is a generalization of the ordinary Fourier transform with an order parameter a. ... -
Fractional fourier transform pre-processing for neural networks and its application to object recognition
(Elsevier, 2002-01)This study investigates fractional Fourier transform pre-processing of input signals to neural networks. The fractional Fourier transform is a generalization of the ordinary Fourier transform with an order parameter a. ... -
Fuzzy clustering and enumeration of target type based on sonar returns
(Elsevier, 2004)The fuzzy c-means (FCM) clustering algorithm is used in conjunction with a cluster validity criterion, to determine the number of different types of targets in a given environment, based on their sonar signatures. The class ... -
Identification of target primitives with multiple decision-making sonars using evidential reasoning
(Sage Publications Ltd., 1998-06)In this study, physical models are used to model reflections from target primitives commonly encountered in a mobile robot's environment. These targets are differentiated by employing a multitransducer pulse/echo system ... -
Location and curvature estimation of "spherical" targets using a flexible sonar configuration
(IEEE, Piscataway, NJ, United States, 1996)A novel, flexible, three-dimensional (3-D) multi-sensor sonar system is employed to localize the center of a spherical target and estimate its radius of curvature. The interesting limiting cases for the problem under study ... -
Location and curvature estimation of spherical targets using multiple sonar time-of-flight measurements
(Institute of Electrical and Electronics Engineers, 1999-12)A novel, flexible, three-dimensional multisensor sonar system is described to localize the center of a generalized spherical target and estimate its radius of curvature. Point, line, and planar targets are included as ... -
Morphological surface profile extraction from multiple sonars
(IEEE, Piscataway, NJ, United States, 1998)This paper presents a novel method for surface profile determination using multiple sensors. Our approach is based on morphological processing techniques to fuse the range data from multiple sensor returns in a manner that ... -
Performance comparison of four time-of-flight estimation methods for sonar signals
(1998-08-06)Performances of four methods of time-of-flight estimation for sonar signals are compared in terms of their bias, standard deviation and complexity: thresholding, curve fitting, m-out-of-N sliding-window, and correlation ... -
Radius of curvature estimation and localization of targets using multiple sonar sensors
(A I P Publishing LLC, 1999-04)Acoustic sensors have been widely used in time-of-flight ranging systems since they are inexpensive and convenient to use. One of the most important limitations of these sensors is their low angular resolution. To improve ... -
Recognition of vessel acoustic signatures using non-linear teager energy based features
(Institute of Electrical and Electronics Engineers Inc., 2016)This paper proposes a vessel recognition and classification system based on vessel acoustic signatures. Teager Energy Operator (TEO) based Mel Frequency Cepstral Coefficients (MFCC) are used for the first time in Underwater ... -
Reliability measure assignment to sonar for robust target differentiation
(Elsevier, 2002)This article addresses the use of evidential reasoning and majority voting in multi-sensor decision making for target differentiation using sonar sensors. Classification of target primitives which constitute the basic ... -
Surface profile determination from multiple sonar data using morphological processing
(Sage Publications Ltd., 1999-08)This paper presents a novel method for surface profile determination using multiple sensors. Our approach is based on morphological processing techniques to fuse the range data from multiple sensor returns in a manner that ...
